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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        var arr = new Array(22, 50, 99, 18, 5, 87);

        function paixu(arr) {
            for (var i = 1; i <= arr.length; i++) {
                for (var j = 0; j <= arr.length - i; j++) {
                    if (arr[j] < arr[j + 1]) {
                        var change = 0;
                        change = arr[j];
                        arr[j] = arr[j + 1];
                        arr[j + 1] = change;
                    }
                }
            }
            return arr;
        }

        console.log(paixu(arr));
    </script>
</body>

</html>